Caddy 2.4.6 - Open Redirect

id: CVE-2022-28923

info:
  name: Caddy 2.4.6 - Open Redirect
  author: Sascha Brendel,DhiyaneshDk
  severity: medium
  description: |
    Caddy 2.4.6 contains an open redirect vulnerability. An attacker can redirect a user to a malicious site via a crafted URL and possibly obtain sensitive information, modify data, and/or execute unauthorized operations.
  impact: |
    Successful exploitation of this vulnerability could lead to phishing attacks, credential theft,.
  remediation: |
    Upgrade Caddy to version 2.4.7 or later to mitigate the vulnerability.
  reference:
    - https://lednerb.de/en/publications/responsible-disclosure/caddy-open-redirect-vulnerability/
    - https://www.cve.org/CVERecord?id=CVE-2022-28923
    - https://github.com/caddyserver/caddy/issues/4502
    - https://nvd.nist.gov/vuln/detail/CVE-2022-28923
    - https://github.com/ARPSyndicate/cvemon
  classification:
    cvss-metrics: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
    cvss-score: 6.1
    cve-id: CVE-2022-28923
    cwe-id: CWE-601
    epss-score: 0.01431
    epss-percentile: 0.698
    cpe: cpe:2.3:a:caddyserver:caddy:2.4.6:*:*:*:*:*:*:*
  metadata:
    verified: true
    max-request: 1
    vendor: caddyserver
    product: caddy
    shodan-query:
      - 'Server: caddy'
      - "server: caddy"
  tags: cve,cve2022,redirect,caddy,webserver,caddyserver,vuln

http:
  - method: GET
    path:
      - '{{BaseURL}}/%5C%5Cinteract.sh/%252e%252e%252f'

    matchers:
      - type: regex
        part: header
        regex:
          - '(?m)^(?:Location\s*?:\s*?)(?:https?:\/\/|\/\/|\/\\\\|\/\\)(?:[a-zA-Z0-9\-_\.@]*)interact\.sh\/?(\/|[^.].*)?$' # https://regex101.com/r/L403F0/1
# digest: 4a0a00473045022100a4d54c44aaaea0a0bce94c38343c0763f28d6f1f29cb55177ac679c1fc23e4580220083128257665be14f936141f5f989c445affb67a15b9923df3970244fcb43a39:922c64590222798bb761d5b6d8e72950